Vulnerability · Published Oct 25, 2021 · Assigned by GitHub_M
CVE-2021-41145FreeSWITCH susceptible to Denial of Service via SIP flooding
High 8.6
In plain English
A high-severity uncontrolled resource consumption in freeswitch from signalwire. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 77% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. FreeSWITCH prior to version 1.10.7 is susceptible to Denial of Service via SIP flooding. When flooding FreeSWITCH with SIP messages, it was observed that after a number of seconds the process was killed by the operating system due to memory exhaustion. By abusing this vulnerability, an attacker is able to crash any FreeSWITCH instance by flooding it with SIP messages, leading to Denial of Service. The attack does not require authentication and can be carried out over UDP, TCP or TLS. This issue was patched in version 1.10.7.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | freeswitch | 1.10.7-r0 | ALPINE-CVE-2021-41145 |
| Alpine:v3.21 | freeswitch | 1.10.7-r0 | ALPINE-CVE-2021-41145 |
| Alpine:v3.22 | freeswitch | 1.10.7-r0 | ALPINE-CVE-2021-41145 |
| Alpine:v3.23 | freeswitch | 1.10.7-r0 | ALPINE-CVE-2021-41145 |
| Alpine:v3.24 | freeswitch | 1.10.7-r0 | ALPINE-CVE-2021-41145 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| signalwire | freeswitch | < 1.10.7 |
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
References
- https://github.com/signalwire/freeswitch/releases/tag/v1.10.7 x_refsource_MISC
- https://github.com/signalwire/freeswitch/security/advisories/GHSA-jvpq-23v4-gp3m x_refsource_CONFIRM